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(NO'MOdBL) D. I. CALHOUN. COMBINED BXGAVATING AND BACK FILLING APPARATUSFOR SBWERS, &c.

No. 597,312. Patented Jan. 11,1898.

2 Sh-eets-Sheet, 2.

(N0 Modem 1]). I. CALHOUN. COMBINED EXGAVATING AND BACK FILLINGAPPARATUS FOR SBWERS, &c.

Patented Jan. 11, 1898.

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UNITED STATE Area-r twice.

DANIEL I. CALHOUN, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE CALHOUNEXOAVATOR COMPANY, OF SAME PLACE.

COMBINED EXCAVATING AND BACK-FILLING APPARATUS FOR SEWERS, do.

SPECIFICATION forming part of Letters Patent No. 597,312, dated January11, 1898.

Application filed n ry 9, 1897. Serial No. 618,553. (No model.)

To all whom. it may concern.-

Be it known that I, DANIEL 1. CALHOUN, a citizen of the United States ofAmerica, residing at Chicago, in the county of Cool: and

State of Illinois, have invented new and useful Improvements in aCombined Excavating and Back-Filling Apparatus for Sewers and the Like,of which the following is a specification.

My invention relates to certain new and improved apparatus the object ofwhich is to excavate a trench, such asis made in the construction of asewer, and at the same time to back-fill or cover the completed sewer,the dirt being taken up from the trench in advance of the sewerconstruction, carried therefrom, and deposited at a distance upon thecompleted sewer, so that it is handled but once, the ground in advanceof the apparatus being untouched,'and the sewer in the rear of the samebeing fully completed and backfilled.

The invention consists in certain novel features of an apparatus whichwill befully described below, and the essential portions of which willbe pointed out in the claims appended hereto.

The drawings present five views of the preferred-form of my apparatus,Figure 1 being a side elevation of the apparatus complete, showing themanner of using the same in sewer construction. Fig. 2 is a plan view ofthe same. Fig. 3 is a section in the plane 3 3 of Fig. 2, but showingthe device upon a larger scale. Fig. 4. is a detail section in plane 4 4of Fig. 3; and Fig. 5 is a similar section, partly broken away, in plane5 5 of Fig. 2.

Looking first at Figs. 1 and 2, M represents the advanced portion of atrench, and N the customary piling used to sustain the side wallsof thetrench and prevent the falling in of the dirt during the building of thebrickwork of the sewer. O is a portion of said brickwork.

P is the earth from the excavation piled up upon the completed sewer.

A temporarytrack T is laid along each side of the excavation to supportand render easy the moving of the excavating apparatus. A hoisting-car Ais run upon this track iinm ediately in advance of the excavation, saidhoisting-car being provided with a suitable engine or motor a and atower a Above the portion of the trench in which the construction of thesewer is going on and just in advance of the back-fill Pisa dumping-carB, upon which is mounted a rearwardly-inclined tower b, extending backover the fill and sufficiently elevated at its end to clear any possibleelevation of dirt upon the sewer. This tower is made up of two sideframes 19 b the upper portions of which are entirely separate, except atthe extreme top, to'allow the passage of the load between them. Both thedumping-car and thehoisting-car are mounted upon wheels b a so that theymay be easily moved forward upon the track T as the work progresses.

Between the hoisting-car and the dumpingcar is an open framework F,mounted upon wheels f of sufficient length to span the portion of thetrench in which the sewer construction is going on, said open framebeing constructed witha minimum number of cross braces or trusses inorder that it may not interfere with such construction and being yet ofsufficient strength and rigidity to prevent the hoisting-car anddumping-car from being brought together under the strain of theconveying apparatus. Secured to the top of the inclined tower B on thedumping-car is a carrying-cable O. Said cable extends therefrom to thetop of the tower 03, upon the hoistingcar, from which it passes onwardovera strut a, down to the framework of the car, and is fastened theretoat c. This cable is designed to carry the load of dirt, and for suchpurpose is provided with a carrier 0 from which is suspended a scoop Eby means of a cable 8, running to a drum 6. The carrier is moved backand forth upon the cable O by means of an endless cable D D, runningover a pulley d at the top of the inclined tower b, pulleys d d upon thetower a and around a drum d The dirt in the trench is scooped up in 5the scoop E in advance of the sewer construction, lifted up to thecarrier 0 carried across over the advancing brickwork to the inclinedtower b, and there dumped upon the completed sewer by means of atripping'device C. In this operation the great strain of thecarryingcable upon the two cars is sustained 'by the open framework F,the same being mounted upon the track in a manner similar to the twocars and moved forward with them step by step as the constructionadvances.

I claim as new and desire to secure by Letters Patent 1. The combinationin a sewer-excavating and baolcfilling device and with a suitable trackadapted to span the sewer, of the hoisting-ear, A, the dumping-car, B,and the intervening open framework, F, all mounted upon wheels on thetrack, the tower, a and the hoisting apparatus, a, on the hoistingcar, atower upon. the car, B, said tower be,- ing composed of the two sideportions, 6 b the upper portions of which are entirely separate exceptat the extreme top, a carryingl cable stretched between the tops of thetwo towers, a carrying device upon the cable, a digging anddumpingdevice connected therewith. and suitable cables and operatingdevices therefor to load, transport and dump the dirt; substantially asdescribed.

2. The combination in a sewer-excavating and back-filling device andwith a suitable track adapted to span the sewer, of the hoisting-car, A,the dumping-car,B, and the intervening open framework, F, all mountedupon wheels on the track, the tower, a and the hoisting apparatus, a, onthe hoistingcar, the inclined tower, 1), upon the car, B, said towerbeing composed of the two side portions, b b the upper portions of whichare

